Updated the 'DisconnectedMessage' class.

Updated the 'DisconnectedMessage' class by adding JavaDocs.

Projekte/mdga/model/src/main/java/pp/mdga/message/client/DisconnectedMessage.java

@@ -3,10 +3,13 @@
 import com.jme3.network.serializing.Serializable;
 
 /**
- *
+ * A message sent by a client to indicate that it has disconnected.
  */
 @Serializable
 public class DisconnectedMessage extends ClientMessage {
+    /**
+     * Constructs a new Disconnected message.
+     */
     public DisconnectedMessage() {
         super();
     }